Batgirl #13

Cass Cain on the path of vengeance! After a long, snowy trek through the Himalayas, Batgirl and her crew arrive at a hidden refuge deep within the mountains. But there's no time to let their guard down as the Unburied threat returns seeking blood, and Nyssa al Ghul attempts to get Batgirl to join her cause against them. Dark secrets threaten to pull Batgirl into a war she never wanted and force her to confront ghosts from her past and present. Has Nyssa truly turned over a new leaf? And will Cass align herself with old enemies to exact justice against the Unburied for the murder of Lady Shiva?